MANILA - Surgeons had to amputate the right arm of a soldier who was injured when a Sokol chopper crash-landed in Tarlac, the military said Friday.

Brig. Gen. Edgard Arevalo, spokesperson of the Armed Forces of the Philippines (AFP), said Sgt. Byron Deomano is now recuperating at St. Luke's Hospital.

• Helicopter nag-crash landing sa Tarlac

Deomano was the chief aircrew when the helicopter crashed Thursday afternoon at the Colonel Ernesto Ravina Air Base, also known as Crow Valley.

Confined at the Philippine Air Force General Hospital are Maj. Mark Delos Reyes, 1st Lt. Henry Cabanayan, and Airman 1st Class Kevin Kiel Cubangbang.

Delos Reyes, the pilot in command, sustained head injury, while Cabanayan, the co-pilot, and Cubangbang, the other aircrew, did not sustain serious injury.

Meanwhile, retired Air Force Col. Arthur Baybayan was discharged from the hospital after results from a CT scan showed no adverse findings. Baybayan is sergeant-at-arms at the Commission on Appointments.

Arevalo said all other passengers were discharged from hospital on Thursday afternoon after undergoing checkup and treatment.

"The Philippine Air Force (PAF) is currently conducting its investigation to determine the cause of the air accident," he said in a statement.

• Air Force grounds Sokol choppers after helicopter crash landing in Tarlac

Among the passengers was COOP-NATCCO party-list Rep. Anthony Bravo who was attending a legislative stakeholders' engagement activity.

The military has also grounded all of its Sokol helicopters as a precautionary measure while the investigation is ongoing.